In a photochemical reaction A → 2 B, the quantum efficiency with 500 nm light is...
In a photochemical reaction A → 2 B, the quantum efficiency with 500 nm light is 2.1 ✕ 102 mol einstein−1 (1 einstein = 1 mol photons). After exposure of 300 mmol of A to the light, 2.29 mmol of B is formed. How many photons were absorbed by A?
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In a photochemical reaction A → 2 B, the quantum efficiency with
500 nm light is...
One type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 300 nm . Part A What...
One type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 300 nm . Part A What is the energy of a photon of this wavelength? E = 6.03•1019 J SubmitMy AnswersGive Up Incorrect; Try Again; 4 attempts remaining Part B What is the energy of a mole of these photons? E = J SubmitMy AnswersGive Up Part C How many photons are in a 1.10 mJ burst of this radiation? N = photons SubmitMy...
One type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 300 nm . a)What is the energy of a...
One type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 300 nm . a)What is the energy of a photon of this wavelength? E = 6.62×10−19 J B) What is the energy of a mole of these photons? E = C)How many photons are in a 1.10 mJburst of this radiation? N=_______ photons
One type of sunburn occurs on exposure to UV light of wave lengthin the vicinity of 325 nm. a.) What is the energy o...
One type of sunburn occurs on exposure to UV light of wave lengthin the vicinity of 325 nm. a.) What is the energy of a photon of this wavelength? b.) What is the energy of a mole of these photons? c.) How many photons are in 1.00mJ burst of thisradiation? d.) These UV photons can break chemical bonds in you skin tocause sunburn~a form of radiation damage. If the 325 nm radiationprovides exactly the energy to break an average chemical...
1. What is the frequency of visible light with a wavelength of 500 nm? 2. For...
1. What is the frequency of visible light with a wavelength of 500 nm? 2. For each of the following, describe the relationship as directly or inversely proportional: a) wavelength vs. frequency b) wavelength vs. energy c) frequency vs. energy -372.1 nm and 2. - 376,4 nm 3. When sodium is excited in a flame, two ultraviolet spectral lines at respectively are emitted. Which wavelength represents photons with a) higher energy? b) longer wavelengths? c) higher frequencies?
certain beam of light has an intensity of 2,000 W/m2 and a wavelength of 500 nm....
certain beam of light has an intensity of 2,000 W/m2 and a wavelength of 500 nm. If the beam is of sufficient diameter to ill uminate a 1.00-m2 area, how many photons does i detiver to that area uingch second? a. 5 x 1021 b. 1 x 1021 c. 3 x 1022 d. 2 x 1022 e. 4 x 1023
(1 point) A Silver surface (work function = 4.26 eV) is illuminated with 270 nm light...
(1 point) A Silver surface (work function = 4.26 eV) is illuminated with 270 nm light from a 3 mW laser. How many photons per second are emitted by the laser? 4.0909E15 photons/s Only a small fraction of these photons can interact with electrons at the surface. Suppose this fractional efficiency is 0.00031%. What is the current in the detector assuming all the emitted electrons are captured? пA Note that current is charge(in Coulombs) per second. The charge of one...
Need help with a-e 1.) The photosystem of purple bacteria absorbs light at 870 nm. (a...
Need help with a-e
1.) The photosystem of purple bacteria absorbs light at 870 nm. (a (3 pts) Calculate the energy of one mole of photons (1 einstein) of light 1 - 870 nm. (b) ( 3 pts) How many moles of ATP under standard conditions could be theoretically synthesized using this energy? (c) (3 pts) Does this photosystem evolve Oz? Why or Why not? (d) (3 pts) The purple bacteria photoreaction center catalyzes the following reaction: 2 Cycz(Fe)+Q+ 2H...
Gamma rays are photons with very high energy. How many visible-light photons with a wavelength of 500 nm would you need...
Gamma rays are photons with very high energy. How many visible-light photons with a wavelength of 500 nm would you need to equal the energy of a gamma-ray photon with energy 4.1x10^-13J A) 1.0 × 106 B) 1.4 × 108 C) 6.2 × 109 D) 3.9 × 103
1.. Suppose that you shine light of energy 1050 kJ/mol on an H atom in the...
1.. Suppose that you shine light of energy 1050 kJ/mol on an H atom in the ground state. What happens to the light and to the electron? Group of answer choices a. The light is not absorbed and the final energy of the electron is -1312 kJ/mol. b.. The light is absorbed and the final energy of the electron is −328 kJ/mol. c.. The light is not absorbed and the final energy of the electron is −1050 kJ/mol. d.. The...
Problem 3: a. Calculate the wavelength of light in (nm) with a frequency of 1.53x 10"...
Problem 3: a. Calculate the wavelength of light in (nm) with a frequency of 1.53x 10" Hz. Would you be able to see that light? b. Calculate the smallest increment of energy (a quantum) that can be emitted or absorbed at a wavelength of 508nm. c. Calculate the energy of a photon of frequency 4.75 x 10's! Problem 4: Calculate AH for the reaction 2 Al(s) + 3 Cl2(g) - 2 AICI (s) from the following data. En 1:2 Al(s)...
1. What is the frequency of visible light with a wavelength of 500 nm? 2. For each of the following, describe the relationship as directly or inversely proportional: a) wavelength vs. frequency b) wavelength vs. energy c) frequency vs. energy -372.1 nm and 2. - 376,4 nm 3. When sodium is excited in a flame, two ultraviolet spectral lines at respectively are emitted. Which wavelength represents photons with a) higher energy? b) longer wavelengths? c) higher frequencies?
certain beam of light has an intensity of 2,000 W/m2 and a wavelength of 500 nm. If the beam is of sufficient diameter to ill uminate a 1.00-m2 area, how many photons does i detiver to that area uingch second? a. 5 x 1021 b. 1 x 1021 c. 3 x 1022 d. 2 x 1022 e. 4 x 1023
(1 point) A Silver surface (work function = 4.26 eV) is illuminated with 270 nm light from a 3 mW laser. How many photons per second are emitted by the laser? 4.0909E15 photons/s Only a small fraction of these photons can interact with electrons at the surface. Suppose this fractional efficiency is 0.00031%. What is the current in the detector assuming all the emitted electrons are captured? пA Note that current is charge(in Coulombs) per second. The charge of one...
Need help with a-e
1.) The photosystem of purple bacteria absorbs light at 870 nm. (a (3 pts) Calculate the energy of one mole of photons (1 einstein) of light 1 - 870 nm. (b) ( 3 pts) How many moles of ATP under standard conditions could be theoretically synthesized using this energy? (c) (3 pts) Does this photosystem evolve Oz? Why or Why not? (d) (3 pts) The purple bacteria photoreaction center catalyzes the following reaction: 2 Cycz(Fe)+Q+ 2H...
Problem 3: a. Calculate the wavelength of light in (nm) with a frequency of 1.53x 10" Hz. Would you be able to see that light? b. Calculate the smallest increment of energy (a quantum) that can be emitted or absorbed at a wavelength of 508nm. c. Calculate the energy of a photon of frequency 4.75 x 10's! Problem 4: Calculate AH for the reaction 2 Al(s) + 3 Cl2(g) - 2 AICI (s) from the following data. En 1:2 Al(s)...
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